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A blue dwarf star with an unusual spectrum, Achernar has a magnitude of +0.5, making
it the brightest of the stars of Eridanus, and the ninth brightest in the entire sky.
Bright Achernar lies at the extreme southern tip of the star-river Eridanus, less than a degree from its southernmost border with neighbouring Hydrus.
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π Cephei 41 Draconis 50 Leonis Minoris Polis Pincoya Nashira 75 Cygni a Velorum Miram ο1 Cygni Petra TZ Arietis θ Hydrae x Carinae w Carinae Xi Boötis B Sharjah s Velorum A Struve 2398 B Gakyid Berehynia Felixvarela FL Virginis AU Microscopii HD 37131 Nosaxa AX Microscopii b Velorum Gliese 440 GX Andromedae Gliese 687 Guniibuu δ Muscae Cerberus CS Camelopardalis ε Indi Erakis Diya Dombay e Aquilae Ebla Kapteyn's Star Koeia KR Muscae k Hydrae Chaophraya Mekbuda Kruger 60 A DO Cephei La Superba Inquill IL Aquarii δ Caeli Almaaz α Centauri A χ Cygni Sadr ζ Arae Rigel Ross 154 θ Circini ι1 Scorpii Arneb Adhafera HO Librae Antares Mirfak Thabit Hind's Crimson Star 61 Cygni B Achird Capella Mira Mebsuta 61 Cygni A ρ Cygni d Lupi Teegarden's Star Rastaban Acubens Alnilam Ran Alfirk Sargas Polaris ν2 Canis Majoris van Maanen's Star Proxima Centauri Sirius B ε Reticuli U Sagittarii π5 Orionis EE Leonis Atria Suhail BF Orionis Unurgunite Betelgeuse UV Ceti Enif γ Pavonis Tureis Alchiba σ Orionis η Carinae Canopus Schedar Avior Hatysa ο Capricorni B 52 Orionis Naos Deneb Azmidi β Pictoris WX Ursae Majoris τ Ceti Wolf 498 Wolf 359 Wezen 15 Orionis Gliese 536
Achernar
Hertzprung-Russell diagram plotting the temperature and luminosity of Achernar (marked by the red circle) relative to other stars.
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